Trade winds mapped

First world map showing consistent winds. Seasonal winds called monsoons come from the arabic word meaning "season". These and steady winds were never documented before. Halley hinted at sun-heated air but didn't understand reason for westward flow at the equator.
 Edmond Halley England 1686 Trade winds mapped

First world map showing consistent winds. Seasonal winds called monsoons come from the arabic word meaning "season". These and steady winds were never documented before. Halley hinted at sun-heated air but didn't understand reason for westward flow at the equator.